{"id":498,"date":"2019-02-01T23:02:22","date_gmt":"2019-02-01T15:02:22","guid":{"rendered":"https:\/\/blog.tcreopargh.xyz\/?p=498"},"modified":"2019-02-01T23:07:31","modified_gmt":"2019-02-01T15:07:31","slug":"%e8%9e%ba%e6%97%8b%e5%a1%ab%e6%95%b0kotlin","status":"publish","type":"post","link":"https:\/\/blog.tcreopargh.xyz\/?p=498","title":{"rendered":"\u87ba\u65cb\u586b\u6570(Kotlin)"},"content":{"rendered":"\n

\u87ba\u65cb\u586b\u6570\u7684Kotlin\u5b9e\u73b0\u3002<\/p>\n\n\n\n\n

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<\/div><\/td>
import<\/span> java.util.Scanner<\/span>
\nimport<\/span> java.util.Vector<\/span>
\n
\nfun<\/span> main(<\/span>)<\/span> {<\/span>
\n    val<\/span> n =<\/span> Scanner(<\/span>System<\/span><\/a>.`in<\/span>`)<\/span>.nextInt<\/span>(<\/span>)<\/span>
\n    val<\/span> canvas =<\/span> Vector<<\/span>Vector<<\/span>Int>><\/span>(<\/span>)<\/span>
\n    for<\/span> (<\/span>i in<\/span> 0<\/span> until n)<\/span> {<\/span>
\n        val<\/span> line =<\/span> Vector<<\/span>Int><\/span>(<\/span>)<\/span>
\n        line.setSize<\/span>(<\/span>n)<\/span>
\n        canvas.add<\/span>(<\/span>line)<\/span>
\n    }<\/span>
\n    var<\/span> direction =<\/span> Direction.RIGHT<\/span>
\n    var<\/span> i =<\/span> 0<\/span>
\n    var<\/span> j =<\/span> 0<\/span>
\n    for<\/span> (<\/span>k in<\/span> 1<\/span>..n<\/span> *<\/span> n)<\/span> {<\/span>
\n        canvas[<\/span>i]<\/span>[<\/span>j]<\/span> =<\/span> k
\n        when<\/span> (<\/span>direction)<\/span> {<\/span>
\n            Direction.RIGHT<\/span> -><\/span> if<\/span> (<\/span>j +<\/span> 1<\/span> >=<\/span> n ||<\/span> canvas[<\/span>i]<\/span>[<\/span>j +<\/span> 1<\/span>]<\/span> !=<\/span> null<\/span>)<\/span> direction =<\/span> direction.next<\/span>(<\/span>)<\/span>
\n            Direction.DOWN<\/span> -><\/span> if<\/span> (<\/span>i +<\/span> 1<\/span> >=<\/span> n ||<\/span> canvas[<\/span>i +<\/span> 1<\/span>]<\/span>[<\/span>j]<\/span> !=<\/span> null<\/span>)<\/span> direction =<\/span> direction.next<\/span>(<\/span>)<\/span>
\n            Direction.LEFT<\/span> -><\/span> if<\/span> (<\/span>j -<\/span> 1<\/span> <<\/span> 0<\/span> ||<\/span> canvas[<\/span>i]<\/span>[<\/span>j -<\/span> 1<\/span>]<\/span> !=<\/span> null<\/span>)<\/span> direction =<\/span> direction.next<\/span>(<\/span>)<\/span>
\n            Direction.UP<\/span> -><\/span> if<\/span> (<\/span>i -<\/span> 1<\/span> <<\/span> 0<\/span> ||<\/span> canvas[<\/span>i -<\/span> 1<\/span>]<\/span>[<\/span>j]<\/span> !=<\/span> null<\/span>)<\/span> direction =<\/span> direction.next<\/span>(<\/span>)<\/span>
\n        }<\/span>
\n        when<\/span> (<\/span>direction)<\/span> {<\/span>
\n            Direction.RIGHT<\/span> -><\/span> j++<\/span>
\n            Direction.DOWN<\/span> -><\/span> i++<\/span>
\n            Direction.LEFT<\/span> -><\/span> j--<\/span>
\n            Direction.UP<\/span> -><\/span> i--<\/span>
\n        }<\/span>
\n    }<\/span>
\n    for<\/span> (<\/span>line in<\/span> canvas)<\/span> {<\/span>
\n        for<\/span> (<\/span>num in<\/span> line)<\/span> {<\/span>
\n            print(<\/span>"$num "<\/span>)<\/span>
\n        }<\/span>
\n        println(<\/span>)<\/span>
\n    }<\/span>
\n}<\/span>
\n
\nenum<\/span> class<\/span> Direction {<\/span>
\n    RIGHT,
\n    DOWN,
\n    LEFT,
\n    UP;<\/span>
\n
\n    fun<\/span> next(<\/span>)<\/span>:<\/span> Direction {<\/span>
\n        return<\/span> if<\/span> (<\/span>this<\/span>.ordinal<\/span> ==<\/span> 3<\/span>)<\/span> RIGHT else<\/span> values(<\/span>)<\/span>[<\/span>this<\/span>.ordinal<\/span> +<\/span> 1<\/span>]<\/span>
\n    }<\/span>
\n}<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n\n\n\n

\u53ef\u4ee5\u770b\u5230Kotlin\u5bf9\u4e8eVector\u548cList\u7684\u64cd\u4f5c\u6bd4Java\u7b80\u5355\u4e0d\u5c11\uff0c\u5c24\u5176\u662f\u4e8c\u7ef4Vector\u6216List\uff0c\u60f3\u8981\u7ed9\u67d0\u4e2a\u5143\u7d20\u8d4b\u503c\u5728Java\u8fd8\u5f97\u5199\u6210vector.get(i).set(j, newValue)\u8fd9\u79cd\u7e41\u7410\u7684\u5199\u6cd5\uff0c\u800cKotlin\u751a\u81f3\u53ef\u4ee5\u76f4\u63a5\u50cf\u4e8c\u7ef4\u6570\u7ec4\u4e00\u6837\u7528\u3002<\/p>\n\n\n\n

\u771f\u9999\uff01<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

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